Light emitting device package

Abstract

The present application relates to a light emitting device package. The light emitting device package includes a package substrate in which a via hole is formed. An electrode layer extends to both surfaces of the package substrate after passing through the via hole. A light emitting device is arranged on the package substrate and is connected to the electrode layer. A fluorescence film includes a first part that fills at least a part of an internal space of the via hole and a second part that covers at least a part of the light emitting device.

What is claimed is: 
     
       1. A light emitting device package comprising:
 a package substrate in which a via hole is formed; 
 an electrode layer extending through the via hole and along both surfaces of the package substrate; 
 a light emitting device arranged on the package substrate and connected to the electrode layer; and 
 a fluorescence film including:
 a first part that fills at least a part of an internal space of the via hole, and 
 a second part that covers at least a part of the light emitting device. 
 
 
     
     
       2. The light emitting device package of  claim 1 , wherein the fluorescence film is integrally connected from the first part to the second part. 
     
     
       3. The light emitting device package of  claim 1 , wherein the first part of the fluorescence film is positioned in a location that blocks an entrance of the via hole at an inside of the via hole. 
     
     
       4. The light emitting device package of  claim 1 , further comprising:
 a lens unit covering the light emitting device and the via hole, 
 wherein the lens unit includes a local protrusion unit that is protruded to an inside of the via hole and covers the first part of the fluorescence film. 
 
     
     
       5. The light emitting device package of  claim 1 , wherein the fluorescence film includes:
 a phosphor of a first volume %, 
 a polymer resin of a second volume % that is greater than the first volume %, and 
 filler particles of a third volume % that is smaller than the first volume %. 
 
     
     
       6. The light emitting device package of  claim 5 , wherein the filler particles are formed of at least one of TiO 2 , SiO 2 , Al 2 O 3  and AlN. 
     
     
       7. The light emitting device package of  claim 1 , wherein the package substrate has a mounting surface where the light emitting device is arranged, and a back surface opposite to the mounting surface, and
 wherein an entrance of the via hole located at the mounting surface is smaller than an entrance of the via hole located at the back surface. 
 
     
     
       8. The light emitting device package of  claim 1 , wherein the package substrate includes a sloped sidewall that limits the via hole. 
     
     
       9. The light emitting device package of  claim 8 , wherein the sloped sidewall converges toward the back surface from the mounting surface. 
     
     
       10. The light emitting device package of  claim 1 , wherein the light emitting device is arranged at a location that does not overlap with the via hole. 
     
     
       11. The light emitting device package of  claim 1 , further comprising:
 a reflective film that covers a sidewall of the light emitting device in a space between the light emitting device and the fluorescence film. 
 
     
     
       12. A light emitting device package comprising:
 a package substrate including a mounting surface, a back surface opposite to the mounting surface, and a first via hole and a second via hole that are respectively defined by a sloped sidewall extended to the back surface from the mounting surface; 
 a first electrode layer extending through the first via hole and along the mounting surface and the back surface; 
 a second electrode layer extending through the second via hole and along the mounting surface and the back surface; 
 a light emitting device arranged on at least one of the first electrode layer and the second electrode layer on the mounting surface of the package substrate; and 
 a fluorescence film including:
 a first part that fills at least a part of an internal space of the first via hole, 
 
 a second part that fills at least a part of an internal space of the second via hole, and 
 a third part that covers at least a part of the light emitting device. 
 
     
     
       13. The light emitting device package of  claim 12 , wherein the light emitting device is arranged at a location that is spaced apart from the first via hole and the second via hole on the mounting surface. 
     
     
       14. The light emitting device package of  claim 12 , further comprising:
 a first conductive junction layer that is formed between the light emitting device and the first electrode layer; and 
 a second conductive junction layer that is formed between the light emitting device and the second electrode layer. 
 
     
     
       15. The light emitting device package of  claim 12 , further comprising:
 a conductive wire that is connected between at least one of the first electrode layer and the second electrode layer, and the light emitting device, 
 wherein the fluorescence film further includes a fourth part that covers at least a part of the conductive wire. 
 
     
     
       16. A light dimming system comprising:
 a light emitting module; 
 a power supply for receiving power and supplying the power to the light emitting module; and 
 one or more light emitting device packages, each package including:
 a package substrate in which a via hole is formed; 
 an electrode layer extending through the via hole and along both surfaces of the package substrate; 
 a light emitting device arranged on the package substrate and connected to the electrode layer; and 
 a fluorescence film including: 
 a first part that fills at least a part of an internal space of the via hole, and 
 a second part that covers at least a part of the light emitting device. 
 
 
     
     
       17. The system of  claim 16 , wherein the fluorescence film is integrally connected from the first part to the second part. 
     
     
       18. The system of  claim 16 , wherein the first part of the fluorescence film is positioned in a location that blocks an entrance of the via hole at an inside of the via hole. 
     
     
       19. The system of  claim 16 , further comprising:
 a lens unit covering the light emitting device and the via hole, 
 wherein the lens unit includes a local protrusion unit that is protruded to an inside of the via hole and covers the first part of the fluorescence film. 
 
     
     
       20. The system of  claim 16 , wherein the fluorescence film includes:
 a phosphor of a first volume %, 
 a polymer resin of a second volume % that is greater than the first volume %, and 
 filler particles of a third volume % that is smaller than the first volume %.